CN1732089B - Method for constructing high speed multi-color colorful processing printing image and implementing high speed friction-fast process printing - Google Patents

Method for constructing high speed multi-color colorful processing printing image and implementing high speed friction-fast process printing Download PDF

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Publication number
CN1732089B
CN1732089B CN2003801076493A CN200380107649A CN1732089B CN 1732089 B CN1732089 B CN 1732089B CN 2003801076493 A CN2003801076493 A CN 2003801076493A CN 200380107649 A CN200380107649 A CN 200380107649A CN 1732089 B CN1732089 B CN 1732089B
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China
Prior art keywords
print head
ink
printing ink
substrate
printing
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CN2003801076493A
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Chinese (zh)
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CN1732089A (en
Inventor
V·夏马
A·S·戈登
L·K·詹姆森
P·A·肖尔
A·J·多纳利克
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Kimberly Clark Worldwide Inc
Kimberly Clark Corp
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Kimberly Clark Worldwide Inc
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Publication of CN1732089A publication Critical patent/CN1732089A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01Ink jet
    • B41J2/17Ink jet characterised by ink handling
    • B41J2/175Ink supply systems ; Circuit parts therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01Ink jet
    • B41J2/17Ink jet characterised by ink handling
    • B41J2/175Ink supply systems ; Circuit parts therefor
    • B41J2/17593Supplying ink in a solid state

Abstract

A method of creating high-speed multi-color process images. The method includes providing at least two high operating frequency printheads which are capable of processing phase-change inks, providingat least two phase-change inks, providing a substrate, activating the printheads such that at least two inks pass therethrough, and passing the substrate under the printheads at a rate of at least about 1000 feet per minute so as at least one process image is formed on the substrate. The present invention also includes a process for achieving high-speed crockfast process printing on a material withphase-change ink. The process includes providing at least an array of printheads capable of processing phase-change inks at frequencies of at least about 20 kHz, providing a material, providing a mat erial transport system capable of transporting the material under the printheads, providing a plurality of phase-change inks, transporting material under the array printheads at a speed of at least 1000 ft/min, and ejecting ink from at least two of the printheads onto the material so as to form an image.

Description

Make up high speed polychrome process printing image and realize the firm process printing method of high-speed friction
Technical field
The present invention relates to the high speed ink jet printing on Web materials or the finished product.
Background technology
Become to drip as required a piezoelectric ink jet printing equipment be used for ink coats to the various substrates for some time.Usually, become to drip the work of piezoelectric ink jet printing equipment as required, single droplet of ink is sprayed onto in the substrate with preset pattern to be printed.This device is combined with one group of hole in nozzle sets, a plurality of control print head and a controller usually.Generally arrange with perpendicular row in these holes, and conventional ink-jet printing apparatus is combined with the single print head that is communicated with each hole.Print head is controlled by controller, and this control can be keyed in by the operator, with the timetable operation print head according to sequencing, thereby prints one or a series of character or symbol.
Design each hole, so that during the each triggering of its related print head, each hole sprays single droplet of ink.The substrate of heading direct for character to be printed or symbol according to the drop of the order of sequencing ejection.Except that other factors, the quality of become dripping the formed printed matter of ink-jet printer as required also requires accurately to control the size of the ink dot of impact basement.Spot sizes also is subjected to the influence of size of the drop of nozzle ejection conversely.
In the past, in the global design by the representative of the relation between print head characteristic, hole dimension and the ink characteristics, importantly drop not only has suitable size, and this size consistently, otherwise character or the symbol intervals printed are irregular.Certainly substrate or material also can influence the image of gained.
Really, the piezo jet print field has had a lot of progress, but up to now, the piezo jet printing machine still is restricted, because they can not carry out the high-speed color chromatography.It partly is because handled printing ink can not be dry fast enough that existing equipment can not be used to implement high speed printing.That is to say that previous, the needs of registration done thereby can not realize or keep inadequately by used printing ink.Therefore, before to the trial of high-speed color chromatography,, cause or cause deterioration in image quality if can obtain any image.
In addition, up to date, still can not obtain can the high frequency treatment of printing ink and the piezo jet print head of other composition.The progress of print head design has obtained a kind of ink-jet apparatus, and this equipment can the high frequency running according to the present invention.Yet only the ability of high frequency running can not be used to handle all printing ink and composition, and the ability that keeps the printed matter registration also is not provided so far, especially in the running of printing machine high frequency and material at it down at a high speed through out-of-date.To this, a kind of situation is high frequency or runs up that another kind of diverse situation is high frequency and runs up.
Therefore, need a kind of method, the print head of developing recently can be used to provide the high-speed color chromatography of material.
Although conventional ink-jet printing apparatus has been done many improvement, but the piezoelectric ink jet printing equipment that can obtain at present still lacks the ability that makes up at a high speed the multicolour color image, says nothing of at device and has passed in the single stroke of substrate (or the single stroke of device is passed in substrate).Also need a kind of substrate of carrying out the high-speed color chromatography thereon, and material can obtain the level than the higher crock fastness that before obtains under these printing conditions.
Summary of the invention
Individual's medical article adopts conventional contact print art and or water-based inks off-line printing at present.An additional treatment step to printed material is represented in existing printing process, thereby causes cost to raise and the refuse increase.The printing ink that is used for the typical print art also needs drying steps, and this has played restrictive function under the speed of production of economical and efficient.The method of contact printing of the existing ink system of band can not effectively move under the conventional linear velocity of individual medical product conversion machine at all.So, the cost of following the production of slowing down to come to allow to carry out contact print usually limits the number to be printed that can supply in the disposable individual medical product.For this reason, individual medical product of printing and analog are subjected to technical restriction on the conversion production line.
The invention provides a kind of device, discharge acceptable figure on individual medical product and analog, reduce total cost of production, device, refuse and poor efficiency simultaneously in affordable mode.
The present invention relates to a kind of method that makes up high speed polychrome process printing image.This method comprises that (i) provides at least two high operating frequency print heads, and this high operating frequency print head can be handled phase change ink; At least two kinds of phase change inks (ii) are provided; A kind of substrate (iii) is provided; (iv) activate print head so that at least two kinds of printing ink therefrom flow through; And (substrate is passed through under print head with the speed at least about 1000 feet per minutes; Wherein in substrate, form a width of cloth coloured image at least.In a kind of embodiment of the inventive method, print head can have the operating frequency at least about 20kHz.Wish that phase change ink is the hot melt phase change ink.Printing ink can be wax based ink in another embodiment of the invention.
In another embodiment, the present invention is devoted to a kind of method that realizes the process printing that high-speed friction is firm on material with phase change ink.This method comprise (i) provide at least one group can be with print head at least about the frequency processing phase change ink of 20kHz; A kind of material (ii) is provided; A kind of material transport system that can transport or transmit material under print head (iii) is provided; Multiple phase change ink (iv) is provided; (v) under print head, transport material with the speed of 1000ft/min at least; And (on vi) from least two print head ejects printing ink to material forming, form coloured image to small part.The ink jet step comprises the registered placement of printing ink.Depend on the frequency of operating print head, the ink jet step can form the image up to about 200/print head/linear inch.In other embodiments, printing ink only can form the image up to about 100/print head/linear inch.The printing ink selectivity can be coated in all or part of substrate, can be coated in the substrate and/or be coated in the substrate with certain pattern to make up external configuration.In one embodiment, multiple inks can comprise the printing ink of at least two kinds of different colours.In another embodiment, the image that forms on the material can be a multicolor image.Another embodiment of this method can further comprise control element; Wherein this control element is communicated with at least one group of print head; Thereby and wherein this control element control at least one group of print head with ink jet to the material of registered placement.
Description of drawings
Fig. 1 is the schematic diagram of exemplary method of the present invention.
The specific embodiment
Definition
As used herein, term " chemicals " or " chemicals () " be intended to comprise and relate to application, printing ink (except phase change ink), composition, preparation and the analog (comprising those materials that contain solid and/or particle) that print head described in any and all available literary compositions is handled according to the present invention.Wish but nonessential be that term " chemicals " points to this class application, printing ink, composition, preparation and the analog compatible with phase change ink.Suitable chemicals includes but not limited to medicament, printing ink, wax, paint, emulsion, ointment, skin care item, topical application and analog or its combination.One of this class chemicals is used to carry or transports phase change ink as medium and suits.Exemplary medium includes but not limited to the low-molecular-weight linear polyethylene.
As used herein, term " comprises ", " comprise ing (comprising) " and be intended to become open-ended term derived from other speech that the root speech " comprises ", it specifies the existence of any feature of addressing, element, integral body, step or component, but does not get rid of the existence or the interpolation of one or more further features, element, integral body, step, component or its combination.
As used herein, term " fiber " is meant all weavings, braiding or nonwoven web and paper, foam, film or analog.
As used herein, term " hygiene medical treatment articles for use " is meant medical gown, valance, clothing and the equipment that can be used for medical procedure.
As used herein, term " printing ink " is meant phase change ink.
As used herein, term " layer " has single constituent element or multicomponent double meaning when using with odd number.
As used herein, term " melt blown fiber " is meant by molten thermoplastic being extruded a plurality of tiny, normally circular pattern capillaries becomes molten thread or silk, enter at a high speed in normally hot meeting gather qi together (for example air) stream, this air-flow with molten thermoplastic the silk drawing-down to reduce its diameter, can be down to the microfibre diameter.After this, melt blown fiber is carried and is deposited on the melt blown fiber net that forms random dispersion on the collection surface by high velocity air.This method for example is disclosed in the US3 of Butin etc., in 849,241.Melt blown fiber is continuous or discrete microfibre, and average diameter is usually less than 10 microns, and some glues usually when depositing on the collection surface.
As used herein, term " adhesive-bonded fabric " and " non-woven fibre or net " are meant a kind of net, have independently fiber, silk or the line structure of crossover mutually, but do not have certifiable mode as in the braided fiber.Non-woven fibre or net can be formed by several different methods, for example moltenly blow method, be coated with sticking method (spunbonding processes), sticking comb knotted method (bonded carded wedprocesses).The basic weight of non-woven fibre represents that with the ounce number (osy) of every square yard of material or every square metre gram number (gsm) available fibre diameter is represented with micron usually usually.(note the conversion of osy, multiply by 33.91) with osy to gsm.
As used herein, term " personal hygiene article " or " personal hygiene suction product " are meant that diaper, training pant, swimming suit, absorbent underpants, baby wipes, adult-incontinence articles, sanitary napkin, wet tissue, women sanitary articles, wound dressing, protection pad, time-delay discharge adhesive tape, bandage, mortuary articles for use, animal doctor's articles for use, health and absorbent article and analog.
As used herein, term " phase transformation " application, chemicals, printing ink, liquid, material or analog are meant with liquid or basic liquid the processing, solidify then, return the material of initial state in cooling, curing, when crosslinked etc.
As used herein, term " spun-bonded fibre " is meant small diameter fibers, by from a plurality of tiny normally circular capillary of spinning head with have extrude the silk thread diameter the silk thread form with molten thermoplastic, rapidly its drawing-down is formed then, for example the US4 of Appel etc., 340,563, the US3 of Dorschner etc., 692,618, the US3 of Matsuki etc., 802,817, the US3 of Kinney, 338,992 and 3,341,394, the US3 of Hartman, 502,763 and the US3 of Dobo etc., described in 542,615.Spun-bonded fibre is sticking usually on depositing to collection surface the time.Spun-bonded fibre is normally continuous, and average diameter is greater than 7 microns (deriving from least 10 sample), or rather, and between about 10~20 microns.
Remainder at specification may limit these terms with additional language.
As used herein, except as otherwise noted, singular references also comprises plural number usually, and plural term also comprises odd number usually.
Method of testing is described
Crock fastness (also being crockfastness) is meant the transmission resistance of printing ink from the substrate of having printed to another substrate (as clothes) that contacts with this product in the target purposes of product.A kind of modification that adopts the ASTM method of testing F1571-95 of Sutherland Ink Rub Tester is measured the crock fastness of material of the present invention.The change of this ASTM method of testing is two 1 " * 2 " rubber blanket (can from DANILEE company obtain) be applied to the two ends (one at an end) of counterweight bottom surface, on pad, obtain the pressure of (psi) per square inch 1 pound thus.To second change of standard A STM method of testing is not adopt the little cloth that can obtain from Buehler, but (can be from Testfabrics with 80 * 80 white voile cloth Crockmeter Cloth#3, Inc. obtaining, office arranged in the Pennsylvania) materials printed rubs.Notice that ASTM is identified as the method that is intended to be provided for measuring frictional resistance and printing and developing and printing the fuzzy trend of image; Yet, in the method for testing of this change, use it for the image that the test ink-jet printer generates.Also change this method so that testing arrangement running 40 circles rather than 10 circles.The method of this change comprises that also color and the AATCC9-Step Chromatic Transference Scale (1996 editions) that will be sent on the mull (can obtain from AmericanAssociation of Textile Chemists and Colorists, at ResearchTriangle Park, there is office in the South Carolina state) visual contrast, thus the crock fastness grade between definite 1~5.Class 5 represents not have color to be sent on the mull.
Detailed Description Of The Invention
The present invention relates to the method that a kind of high speed makes up the multicolour color image.This method comprises provides at least two high operating frequency print heads 10 (Fig. 1), and this high operating frequency print head can be handled phase change ink; At least two kinds of phase change inks 14 are provided; A kind of substrate 16 is provided; Activate print head so that at least two kinds of printing ink therefrom flow through; And substrate 16 is passed through under print head with the speed at least about 1000 feet per minutes; Wherein in substrate 16, form a width of cloth coloured image at least.In a kind of embodiment of the inventive method, print head can have the operating frequency at least about 20kHz.Can use any suitable print head, if it can with the corresponding to frequency of one or more phase change inks described in the literary composition under carry out function.Wish that phase change ink is the hot melt phase change ink.Wish more in some situation that this phase change ink is a wax based ink.
Although all relate in the whole text under print head through, transmit or transport substrate or material, identical term also can comprise print head process in substrate, the perhaps motion that combine of print head and material, thereby the speed of production that realization is expected.
As discussing in detail in the literary composition, because the phase change ink drying-free, use phase change ink, particularly hot melt printing ink, more especially wax based ink makes it possible to carry out desired high speed printing herein.Before, limited speed of production the drying time of used printing ink and composition in the printing machine.The needs to space between extra drying steps and/or the print head have been avoided in the use of phase change ink, and these all are previous required.Thereby, can obtain registration and the picture quality expected at a high speed.
The image that generates according to the process described in the literary composition and method also can be the result of fluid control characteristic of the print head of some suitable equipment.That is, some print heads further make it possible to carry out high frequency jet for the degassing ability that printing ink provided, may be less because interrupt in the printing ink supply of giving print head.Phase change ink combines with the ability that makes those printing ink degassings the effect of enhancing can be provided during having determined thus to handle.In fact, the result also can obtain than the previous higher print head operating frequency of known those frequencies.
In another embodiment, this method can comprise provides a controller or a control device 18 (Fig. 1), and wherein control device is communicated with print head.Wish that control device 18 can operate in many ways and can control print head 10, thereby print head 10 works jointly or independently of each other.The control device that is appreciated that any number all is applicable to the present invention, and it partly depends on the number of the print head that each control device is communicated with.Exemplary control device is from the manual control element that changes to computer control or computer regulated (for example hand switch, row energizing switch, photoelectric sensor and floppy drive on-off circuit).
Also as shown in Figure 1, drum 20 and a plurality of support roller 22 are as the part of material transport system.Design drum 20 and support roller 22 is compatible with the material 16 of process from it, thereby when through on the drum 20 or on every side the time, material 16 is in does not have the form or the position of wrinkling substantially.Can regulate support roller 22, thereby expectation can be applied tension on the material with smoothing wrinkle or reduce fold, if material does not apply some tension force thereon through on the drum 20 or on every side the time, fold will be present in the material 16 so.That is, when material 16 through on the drums 20 or on every side the time, support roller 22 is used in the tension force of creating or keep expectation on the material 16.Although can expect and understanding drum 20 is shown among Fig. 1 and addresses herein, but certainly have no intention to limit the invention to this, this term is intended to refer to or include but not limited to any and all surfaces that material to be printed can pass through from it, thereby, be suitable on material, printing when through on this surface or on every side the time.In addition, although mention a plurality of support rollers 22, with regard to scope of the present invention, also be intended to comprise when material under print head through out-of-date all other suitable parts that can be used for keeping or regulating tension force on the material.In addition, although can expect print head and treat thereon the distance between the materials printed or can become at interval,, when wishing to carry out ink-jet or printing, material is apart from the about 2mm of print head~about 3mm.It will also be appreciated that when drum and support roller spare or analog usefulness act on the system that transports material a part of, can with print head with the pattern of expectation be positioned at print head around so that print head and the gap between the material of process from drum or be spaced apart the distance of expectation.Can infer when the distance between print head and the material can keep constant relatively, will make it possible to the more uniform image of printing with drum or analog.
In an embodiment of the invention, being coated onto material or suprabasil printing ink and/or chemicals can infiltrate through wherein with various degree, thereby the different penetration degrees of printing ink and/or chemicals can form the material with different external configuration.As infering, the changing unit of penetration degree is because treatment of printing ink and/or the temperature of medium (if any), the material of anoint China ink and/or the composition of printing ink and/or its medium (if any).Therefore, for example when material is easy to accept infiltration, if printing ink is big in the time of can predicting infiltration than lower temperature so as expected to pass one or more print heads at least about 115 ℃ temperature.
In yet another embodiment of the present invention, one or more printing ink are coated in all or part substrate selectively.Can with repeat or random image or pattern with ink coats to substrate, also can coated substrate to form the fluid obstacle.Following will the detailed description in detail, will be by this way with at least two kinds of ink coats to small part material or substrate, to form coloured image; Yet, on any or whole other parts of material, can apply printing ink and/or chemicals so that its discrete overlapping or continuous placement of fragment, and/or interconnect (i.e. the discrete droplets that forms merge or in conjunction with) in some cases, to form discrete scope or zone.Except or break away from its image applications, discrete fragment, especially those discrete segments of placing continuously can form or create and have for example basal region or the scope of fluid obstacle characteristic, groove character etc.The another kind of embodiment of material of the present invention provides the topography of chemistries that can improve fluid control and/or epidermis separation.
Although printing ink keeps suitable position (promptly can not discharge) after the expectation location in reception material or substrate usually, there also have to be suitable to the releasable situation of small part printing ink.Selectively, exist printing ink to remain on suitable position but one or more chemicals of handling together with phase change ink can d/d situation.Thereby, although may expect printing ink in one or more embodiments remains on suitable position and/or shows crock fastness (crockfastness) highly, but when in medium or analog, handling treatment of printing ink, be exposed in the specific environment or when specific function takes place (for example being exposed to specified temp (for example at least about body temperature (about 23 ℃), damage etc.)) one or more chemicals also can from substrate or other chemicals, discharge.Suspect that further one or more chemicals discharge the triggering deterioration that may cause or cause all or part product or substrate from substrate.That is, the design products obtained therefrom is so that when the chemicals of one or more printing ink and/or product discharged, deterioration began or is initiated.
Advised that as above method of the present invention comprises the step that substrate is provided, the printing ink of ejection and/or chemicals can form discrete droplets or fragment in this substrate.Although the expectation material is a porous material at least a embodiments of the present invention, more wish it is polyolefin, method of the present invention and procedure contemplates are used any suitable porous or pore-free material.The suitability of certain material may depend on, depends in part on the used printing ink and/or the chemicals that connect with it at least.Exemplary material includes but not limited to woven fabric, adhesive-bonded fabric, paper, foam, film, tulle, metal, plastics, glass, laminate, and any surface of common any substrate or product, on this surface can or in this way or so that the mode that forms those materials as described herein apply printing ink as herein described and chemicals.Suspect that further material can comprise or contain flexible packing products, cloth products, health care product and individual medical supplies, it is a kind of or various ingredients and analog.
The combination of four kinds of basic colors (for example cyan, magneta colour, yellow and black) can be used for constructing extremely wide multi-color spectrum, thereby uses print head and the Se Ku that significantly reduces than method in the past.Compare with existing contact print equipment, this method has not only reduced the number of inks of required maintenance among equipment cost and the stock, and the time of having reduced the quantity of the quantity of required reforming unit, shared floor space and having followed complete variable color to consume.Satisfy described drawing needs herein although have been found that the simplest and flexible must being enough to of above-mentioned four kinds of color combinations, known various other color combinations also can be competent at.Exemplary combined comprises that those only have a kind of color and those to have the nearly color of 12 kinds of colors, and it makes can be to the more pigment of rich shade concentration that has of producing wide region more.Imagination can be used in combination the printing ink that surpasses 12 kinds of colors, yet, the number of the size of used drum, print head and/or hold the required look storehouse of different printing ink and must be construed as limiting in the manufacturing to the number of final used color.
Imagination is applicable to that printing ink of the present invention can obtain with shades of colour, and the printing ink of at least two kinds of different colours is used in expectation.In addition, when the printing ink of different colours and/or chemicals were used in above method and the process, gained pattern that forms on material or image can be such: form monochrome and multicolor image.That is, for example when using yellow and blue ink, the gained pattern can be green, perhaps can be yellow and blue, perhaps can be green, yellow and blue.Certainly also can form the shades of colour of different colourities.
Although do not specialize, be adopted as the device that process printing is provided and arranges and partly realize method of the present invention at least.That is, should settle at least two print heads so that its emission or ejecta to the small part crossover with the structure coloured image.The printhead orientations of any number all is fine, and expects and can all be used for the present invention by the structure that all are suitable.Although the fundamental of process printing is (as Pocket Guide to Color ReproductionCommunication﹠amp; Described in the Control, Miles Southworth (1972)) be conventionally known to one of skill in the art, but for a person skilled in the art, under high production speed, the high print head frequency and/or the process printing ability on some described herein materials still unknown.Up to now, it also is unknown printing with phase change ink under the described in this article operating condition.
In another embodiment of the invention, this method can comprise the supplying temperature sensor, wherein temperature sensor measurement and not necessarily can control the printing ink that passes used print head and/or the temperature of chemicals.When adopting multiple inks and/or chemicals, will expect to use one with upper sensor with ink-jet printing apparatus.
Can expect that methods and processes discussed herein will cause the discrete segments of ejection printing ink and/or chemicals, although many sizes of discrete segments are conceived, but wish that discrete droplets or fragment have the volume between about 5 skin liters (or nanogram)~about 100 skin liters (picoliters), more wish between about 20 skin liters~about 90 skins rise, to wish most between about 50 skin liters~about 80 skins rise.Wish that also drop and fragment have length and the width less than about 5mm, more wish, wish more less than about 2mm and greater than about 0.02mm less than about 3mm.Hope is with 20kHz at least, more wish with the ejection of the frequency between about 20kHz~about 40kHz discrete segments.In addition, can be with handling printing ink and/or chemicals herein with wide region viscosity according to method that proposes and describe in detail and process.Hope is in when ejection (under the injection temperation that is raising),, more wishes between about 8~about 30 centipoises between about 5~about 50 centipoises from the viscosity of the printing ink of print head ejection and/or chemicals.In addition, because print head is worked under the driving voltage in wide region usually, the operating voltage that can expect and understand the control print head can be the print head running provides higher frequency, still keeps the drop size or the volume of expectation simultaneously, thereby holds higher material movement or processing speed.
Although imagination and expectation drop or discrete segments have certain cross sectional, size and volume in specific implementations, but in need not those embodiments of certain droplet size and dimension, imagination is used on the material of the present invention the drop of any kind shape of cross section and material.Depend on selected to be coated to selected suprabasil chemicals and for using selected device or method, at least to a certain extent can change and control the shape of cross section of drop, described drop on the substrate surface or under solidify, return at ambient temperature normality, sulfuration, crosslinked etc.Particularly, for example by control as temperature, speed and the distance of dishing out, can change on the substrate surface or under the shape of cross section of drop of curing.Thus, for example, if the temperature of printing ink or chemicals raises, it will deeper infiltrate through substrate before solidifying, thereby form more dome-shaped deposit, and the sedimental height that its aspect ratio lower temperature forms down is low.As a replacement scheme that increases or improve infiltration, temperature control also can cause fusion better between printing ink and the substrate (especially thermoplastic), thus bonding better printing ink.Certainly, desired function (for example fluid obstacle, fluid control, epidermis separate, attractive in appearance etc.) and this dressing of depending on dome are forever or can discharge, must be careful the assembling of selection expectation, include but not limited to weight, shape and the composition of the discrete segments that is coated with.
Recognize that all printing ink and/or chemicals have a temperature, they begin deterioration under this temperature.Depend on used printing ink and/or chemicals, the temperature that deterioration takes place will change, and must carefully not surpass degradation temperatures usually during the processing; Yet suspect to have one or more such situations: the part deterioration generates desired characteristic.
Although be not to be certain, depend on printing ink and the material selected for use mutually, the infiltration of higher degree may cause the crock fastness (crockfastness) of higher degree.Although crock fastness depends on that not necessarily penetration degree is (because for example also have valence bond or interaction partners crock fastness and contribute.), but when printing ink was realized the infiltration of higher degree in material, some or all printing ink all remained on suitable position probably.Wish that the printing ink in the image obtains crock fastness grade at least about 4 according to above-mentioned steps, described image is made according to process of describing herein and setting forth and method.
In another embodiment, the present invention also is devoted to a kind of method that realizes (crockfast) process printing that high-speed friction is firm on material with phase change ink.This method comprise (i) provide at least one group can be with print head at least about the frequency processing phase change ink of 20kHz; A kind of material (ii) is provided; A kind of material transport system that can transport material under print head (iii) is provided; Multiple phase change ink (iv) is provided; (v) under print head, transport material with the speed of 1000ft/min at least; And (on vi) from least two print head ejects printing ink to material forming, form coloured image to small part.The ink jet step comprises the registered placement of printing ink.Depend on the frequency of operating print head, the ink jet step can form the image up to about 200/print head/linear inch.In other embodiments, printing ink only can form the image up to about 100/print head/linear inch.The printing ink selectivity can be coated in all or part of substrate, can be coated in the substrate, and/or be coated in the substrate to make up external configuration with pattern and random fashion.When with the other embodiments, specific external configuration can provide or produce the benefit of epidermis protection.Printing ink and/or chemicals form external configuration in substrate application can provide final products or its component, and its fluid control and/or epidermis that shows improvement separates during use.
Multiple inks should comprise the printing ink of at least two kinds of different colours.In another embodiment, the image that forms on the material can be a multicolor image.Another embodiment of this method can further comprise control element; Wherein this control element is communicated with at least one group of print head; Thereby and wherein this control element control at least one group of print head with ink jet to the material of registered placement.
Can expect that in all other printing machines, the piezo jet printing machine is suitable for being connected use with process with method as herein described.So, can comprise from the step of at least one print head ejects or ejection printing ink and/or chemicals and excite or trigger one or more at least one group of print head.This process can also comprise provides a control element or control device, wherein one or more connection the in control element and at least one group of print head.Control element makes it possible to control one or more print heads by this way: permission will arrive in the substrate to be deposited from the printing ink and/or the chemicals of its injection or ejection, thus structure or generation pattern.
Control element also can provide the real-time adjusting to the ejecta of at least one print head.Be adjusted in real time and can carry out or provide immediately between printing equipment on-stream period of the present invention or substantially simultaneously control or change.The speed that can be conditioned according to equipment therefor of the present invention usually by time qualified for approximating exciting or half of minimum period of pulse of companion devices print head.Promptly, minimum pulse or excitation cycle are that the print head paid close attention to is from igniting or spray change in location and turn back to the used shortest time of same position, perhaps, in other words, minimum pulse or excitation cycle be print head excite or spray between the required shortest time of circulation.When continuing to increase the print head service speed that is applicable among the present invention, exciting or spraying frequency also increases, and causes the pulse period to shorten.The present invention reckons with all these achievements in research.
Control in real time also can combine with one or more sensors of arranging along device, and described device is in order to producing product or its component, thereby can change the pattern, amount, position etc. of printing ink and/or chemicals.If the multiple size of material or shape are being printed device and are handling, the real time altering of print head or one group of print head operating period is favourable, thereby depend in product or the component handled, expect its different pattern, preparation, direction or similarity.Accurately this system of control provides great pattern flexibility, thereby be used in production period and almost change pattern at once by promoting button, for introducing new feature such as various packing or seasonal pattern create openings, this is impossible for the traditional printing technology.Compare with previous process printing technology, ability with real-time control or " rapidly conversion " production variation can be brought significantly improving of productivity, previous process printing technology adopts fixing print pattern, those patterns on the rotogravure printing roller for example, the production downtime that need come with regard to roll change more with each change pattern or product.
And, adopt computer generation printed design or computer operation print head to make design configuration almost unlimited with application.Can write computer program, thereby need with mathematics, especially to substrate, printing ink and/or chemicals, for example capillary size, length, pressure, degradation temperatures wait and design the product material.In case structure is finished, and just can will design accurately in substrate by ink jet printing according to the present invention and create.
Because image style can numeral generate, they can infinitely change and change immediately.Use phase change ink as herein described further to strengthen the number of possible pattern, this pattern is suitable for and process printing is carried out in the speed that can enoughly also be not suitable for up to now maybe can not obtaining and certain material or substrate.That is, the use of phase change ink can obtain to be different from previous with no phase change ink obtainable substrate permeate and with the adhesion of material.Thereby, can obtain also NO up to now higher crock fastness grade in some cases.
The embodiment of other of the inventive method and process makes the preparation of expectation printing ink and/or chemicals pass print head in the one stroke of substrate.Process of the present invention and method can realize the printing described in the literary composition, and need not material, printing ink and/or chemicals are carried out the pre-or post processing of drying or chemistry.The single step printing need not ability pre-or post processing or drying a line production is provided.That is, material or substrate can be released, print and cutting.Certainly, multistep is produced and also is fine, but not too expectation usually.
Though, process of the present invention is such: conceive one group of print head work (for example have the long time of staying or have many typesetting and printing brushes etc.), thereby can print head from suprabasil one stroke or substrate in the one stroke of print head, finish printing; But in some cases, may expect to make or obtain printing ink and/or chemicals and image in view of the above, pattern, external configuration, fluid control character and similar aspect through the repeatedly stroke of print head by substrate.As noted, process of the present invention and method do not need pre-or post processing usually, yet pre-or post processing also is not precluded within outside the content disclosed herein.Thereby, may expect repeatedly stroke method because of a variety of causes, include but not limited to wish material, printing ink and/or chemicals are carried out those situations of pre-or post processing.In addition, may wish by making substrate repeatedly come manufactured materials that adopt releasable inorganic agent or chemicals this moment by print head, the sequence number that for example transfers Yahiaoui etc. jointly be in 09/938,347 the U.S. Patent application disclosed those.
Although repeatedly mention common print head herein, although any suitable print head can be imagined in view of the above, but be applicable to that print head of the present invention is the print head of Spectra, model Galaxy PH 256/80, a kind of Piezoelectric Driving print head can be from Spectra, and Inc. obtains, it is at Lebanon, and New Hampshire has office.Determined for Galaxy PH256/80, wish between about 100~about 200 volts, more wish this print head of operation under the voltage between about 110~about 185 volts, to obtain drop mass size as herein described and consistency.Above-mentioned voltage range has no intention to contain all print heads, and only is the expected range as above-mentioned specific Spectra type.So, any and all operations voltage that produces the drop mass consistency under other operating condition described herein all suits, and all contemplated by the present invention.
In addition, although the Piezoelectric Driving print head has various operational capacities, this device can discharge the drop of diameter in about 50~90 micrometer ranges with 1/200 azimuth resolution at least about an inch usually.Imagination can be used process of the present invention and method with any improved Piezoelectric Driving print head or analog, improves to be to increase to excite or the extension and/or the azimuth resolution of print head operating frequency, liquid-drop diameter scope.
The example of the print head that other are suitable includes but not limited to noncontact, one-tenth drips a print head as required, those print heads of on the piezoelectron crystal, operating for example, this print head can be operated in the scope of about 20~about 40kHz, discharges the drop up to the 80ng size.This ability makes this print head each nozzle each second can spray about 20,000~about 40,000 drops.In this frequency range, operate print head, traditional network speed or linear speed at least about 1000~about 2000 feet per minutes (fpm) is provided simultaneously, will be created at least about under the 1000fpm up to about 100~200/hole/linear inch and at least about under the 2000fpm up to the output of about 100/hole/linear inch.
As result of the present invention, can be with the speed of production of economical and efficient, gained four color look printed patterns are discharged on the material with line ground of minimum ink usage, as be used for those materials of personal hygiene article and analog.These patterns are usually by any color up to about 100~about 200 every linear inches, and adopt that four colour cells are fashionable to be constituted up to about 400~about 800 every linear inches.[note: described per inch is meant the number that drips that drips number or axial per inch of every linear inch, unless opposite indication is arranged.In addition, unless opposite indication is arranged, described per inch also is to each print head or hole, thereby also is to every kind of color].
In a word, the present invention is devoted to a kind of method, and phase change ink non-contacting by applying, that become to drip as required is with the typical production linear velocity of this production, discharge the polychrome registered graphics to material, described material wishes it is personal hygiene article, health articles for use and analog.For example be used for those materials that disposable products (for example personal hygiene article and analog) are made for many substrates, although may see or expect to see higher point/every foot (dpi) advantage of employing in tradition drawing medium, higher dpi does not obtain same perceptible advantage.To porous material especially like this.Therefore, increase dpi visibly different picture quality not necessarily is provided.Therefore, depend on the material or the substrate of selecting for use, and depend on the substrate that is used for personal hygiene article especially, determined to realize that by reducing the drop density of printing ink the release cost (for example fund/equipment, printing ink and production cost) bearing is that disposable products discharge acceptable pattern.Adopt the higher frequency print head just, reduce the per inch that is used in substrate, to make pattern simultaneously and drip number, provide with the speed of production of the economical and efficient in the industry chance of running continuously, when using less printing ink, still provide pattern with acceptable quality.That is, for some materials and final products, adopting the pattern than low-density (for example than low quality) also is acceptable.Because more low-density pattern is also satisfactory, therefore obtainable speed of production is significantly improving aspect output and the production cost.
Although describe the present invention in detail in conjunction with its specific embodiment, those skilled in the art are based on the main points of being grasped of the present invention, can be easy to conceive the substituting of described embodiment, modification or equivalents.The invention is intended to this class changed or modification is included in claims and is equal in the scope of description.

Claims (31)

1. method that makes up high speed polychrome process printing image, described method comprises:
At least two high operating frequency print heads are provided, and this high operating frequency print head can be handled phase change ink, and wherein print head has the operating frequency of 20kHz at least;
At least two kinds of phase change inks are provided;
A kind of substrate is provided;
Activate print head so that at least two kinds of printing ink therefrom flow through; And
Substrate is passed through under print head with the speed of 1000 feet per minutes at least;
Wherein in substrate, form at least one and have cover watermark image up to 200/print head/linear inch.
2. the process of claim 1 wherein that print head has the operating frequency of 20kHz~40kHz.
3. the process of claim 1 wherein that substrate is a porous.
4. the process of claim 1 wherein that substrate is a polyolefin.
5. the process of claim 1 wherein that printing ink passes print head with at least 115 ℃ temperature.
6. the process of claim 1 wherein that printing ink is the hot melt phase change ink.
7. the process of claim 1 wherein that printing ink is wax based ink.
8. the process of claim 1 wherein that substrate is the component of personal hygiene article.
9. the method for claim 8, wherein personal hygiene article is selected from diaper, training pant, absorbent underpants, adult-incontinence articles, sanitary napkin, wet tissue, women sanitary articles, wound dressing, bandage, mortuary articles for use, animal doctor with paper handkerchief, amenities and absorbent article.
10. the process of claim 1 wherein that substrate is the part of hygiene medical treatment articles for use.
11. the process of claim 1 wherein that substrate is the part of flexible packing material.
12. a method that realizes the process printing that high-speed friction is firm on material with phase change ink, this method comprises:
Provide at least one group can be with the print head of the frequency processing phase change ink of 20kHz at least;
A kind of material is provided;
A kind of material transport system that can transport or transmit material under print head is provided;
Multiple phase change ink is provided;
Under print head set, transport material with the speed of 1000ft/min at least; And
On from least two print head ejects printing ink to material to form image up to 200/print head/linear inch.
13. the method for claim 12, wherein material is a porous.
14. the method for claim 12, wherein the ink jet step comprises the registered placement of printing ink.
15. the method for claim 12 is characterized in that having one or more of following feature:
Feature 1): wherein said material is a polyolefin;
Feature 2): wherein printing ink passes print head with at least 115 ℃ temperature.
16. the method for claim 12, wherein the ink jet step forms the image up to 100/print head/linear inch.
17. the method for claim 12, wherein multiple inks comprises the printing ink of at least two kinds of different colours.
18. the method for claim 12, the image that wherein forms on material is a multicolor image.
19. the method for claim 12 further comprises control element; Wherein this control element is communicated with at least one group of print head; Thereby and wherein this control element control at least one group of print head with ink jet to the material of registered placement.
20. the method for claim 12 further comprises:
Control element is used to control the ink jet of print head and adjust the speed that print head transmits material down.
21. the method for claim 20, wherein the injection of printing ink depends on the speed that transmits material under the print head.
22. the method for claim 12 further comprises:
The control element of control print head ink jet;
The control element that the control material transmits.
23. the method for claim 22, wherein the injection of printing ink depends on material conveying system.
24. the method for claim 12, wherein printing ink is the hot melt phase change ink.
25. the method for claim 12, wherein printing ink is wax based ink.
26. the method for claim 12, wherein material is the part of personal hygiene article.
27. the method for claim 26, wherein personal hygiene article is selected from diaper, training pant, absorbent underpants, adult-incontinence articles, sanitary napkin, wet tissue, women sanitary articles, wound dressing, bandage, the mortuary and animal doctor and uses paper handkerchief, amenities and absorbent article.
28. the method for claim 12, wherein material is the part of hygiene medical treatment articles for use.
29. the method for claim 12, wherein material is the part of flexible packing material.
30. the method for claim 12 wherein provides the step that can transmit the material conveying system of material under print head to comprise drum and a plurality of support rollers, thereby material is passed through under print head in the mode of not having wrinkle substantially.
31. the method for claim 30, wherein the gap is between material and at least one print head, and when carrying out injecting step, this gap is 1mm~5mm.
CN2003801076493A 2002-12-27 2003-11-26 Method for constructing high speed multi-color colorful processing printing image and implementing high speed friction-fast process printing Expired - Fee Related CN1732089B (en)

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